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E. W. WOLFE. MACHINE POR-BENDING socxnrr BLANKS FOR TUBES.

No. 267.634. Patented Nov. 14,1882.

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Bnw. WOLFE. MACHINE FOR BENDING SOGKBT BLANKS FOR TUBES.

110.267.63 1. Patented No 'v. 14. 188121 I UNITED I STATES EDWARD W.WOLFE, OF READING, PENNSYLVAN[A,'ASSIGNOR TO) THE READING IRON WORKS, OFSAME PLACE.

MACHINE FOR BENDING SOCKET-BLANKS FOR TUBES.

SPECIFICATION forming part of Letters Patent No. 267,634, dated November14, 1882,

Applicationfiled June 1-2, 1882. (Nomodeld To all whom it may concern:

Be it known that I, EDWARD W. WOLFE, a citizen of the United States,and-a resident of Reading, Pennsylvania, have invented certainImprovements in Machinery for Bending Socket-Blanks for Tubes, of whichthe following is a specification.

My invention consists of certain mechanism, fully described hereinafter,for bending scarfed bars so as to form socket-blanks, to be subsequently converted by welding and threading into sockets for connectingpipes together.

In the-accompanying drawings, Figure 1, Sheet 1, is a vertical sectionof the bendingmachine; Fig. 2, Sheet 2, a plan view of the machinewithout the clamping device, and showing part only of the mainbevel-wheel; Fig. 3, a plan view of; the base of the machine and part ofthe annular track Fig. 4, Sheet 1, an end view of part of Fig. 1; Fig.5, a diagram illustrating the operation of the machine, and Fig. 6 aview illustrating a modification of my invention.

The base A ofthe machine has a central projection, I), and on the latteran arbor, a, adapted to the hub of the bevel-wheel B, into which gears abevel-pinion, D, on the driving-shaft E, which is adapted tobearing-blocksF F, se

cured to the base A, and which is provided witha suitable handle, 0.Into a square recess in the arbora is fitted the square lower end, f,-of the detachable mandrel G, which is secured to the central projection,b, of the base, in the present instance by a bolt, h. Avertical roller,H, is adapted to turn on a pin, 6, carried by a sliding bracket, K,which is adapted to guides jj, formed in the present instance on thebevelwheel B, the said bracket admitting of being moved radially from ortoward the center of the wheel, to which the bracket is confined,preferablyin the manner shown in Fig. 4. The bracket audits roller H areunder the control of a screw, M, the thread of which is adapted to thatof a nut, N, confinedto a plate, P, which is secured to the wheel B.

An annular track, T, is secured to the base of the machine,and on thistrack bearsa roller,

' m, journaled to a hangenn, secured to the under side of the said wheelB.

The fixed mandrel G has a flange, q, which bears upon the arbor a andon; the hub of the wheel B, and is overlapped by the lower end of theroller H, the latter being as near as possible to the flange withoutbeing in close friction-a1 contact therewith. To lugsp p on this flangeq of the mandrel is pivoted the cranked lever U, the upper portion or'handle, to, of which is provided with a device by which the lever can belocked to or released from the man drel, the device consisting in thepresent instance of a spring-bolt, t, and an arm, a, pivoted to thelever and passing through the bolt, so that by moving the arm toward thehandle of the lever the bolt will be raised, and on releasing the armthe bolt will be forced downward into an orifice in the head of the bolth.

A jaw-plate, y, is dovetailed at its upper and lower ends and adapted todovetailed guides in the lever, so that while it is retained laterallyon the lever it can be movedoutward therefrom by set-screws s s.

In using the machine the clamping-lever is first unlocked and movedback, so that the heated bar, which is of the required length andproperly scarfed at the ends, can be introduced between thejaw y and themandrel, when the latter is locked and the heated bar or plate held nearone end, after which the sliding bracket K is moved toward the center ofthe machine by turning the screw M, and the roller H thereby forced hardagainst the bar, the relative positions of the roller, clamp, heatedplate, and mandrel being those shown in the diagram, Fig. 5. The wheel,bracket, and roller are now turned in the direction of the arrow shownin that figure until the roller reaches the position indicated by dottedlines, when the heated bar will have been bent to the proper shape,ready for conversion by welding into the desired pipe-socket.

It will be noticed that thereis in theside of the mandrel, and extendingthrough the top of the same, a recess, g, into which one jaw of a pairof tongs can be introduced, in order to permit the withdrawal by thesaid tongs of the bent bar or socket-blank from the mandrel, theclamping-lever 0 having been first unlocked and thrown backto permitthis withdrawal.

It is not essential in carrying out my invention that the roller-bracketK and the device 'for moving the same should form part of a rangedtoturn on the fixed arbor a, this arm carrying the adjustable bracket Kand its roller, the outer end ofthe arm carryinga roller which bears ontheannular track, and a bevel-Wheel being secured to the hub of the arm,so as to be driven by a similar wheel, E. The roller H, moreover, may beadapted to turn on a fixed spindle, and the mandrel G, with itsclamping-lever, may be rotated by means of mechanism which will readilysuggest itself to a skilled mechanic.

I claim as my invention- 1. The combination, in a machine for bendingbars into socket-blanks, of an adjustable roller, H, a mandrel, G, adevice for clamping the bar to the mandrel, and mechanism wherebytheabove-inentioned elements are caused to cooperate, substantially asdescribed.

2. The combination of the mandrel G with a clamping-lever, O, and adevice whereby the said lever may be locked to or unlocked from the saidmandrel,all substantially as specified.

3, The combination of the mandrel G, with the clamping-lever O pivotedto the said inandrel, and the adjustable plate 3 carried by the saidlever, substantially as specified.

4. The combination of the mandrel G, a device for clamping a barthereto, a wheel, B, or its equivalent, adapted to a fixed arbor, a, andcarrying a roller, m,-adapted to an annular track, with a bracket, K,adapted to guides on the said wheel, and carrying a roller, H, allsubstantially as set forth.

In testimony whereofI have signed my name to this specification in thepresenceof two subscribing Witnesses.

7 ED. W. WOLFE.

Witnesses:

HARRY DRURY, HARRY SMITH.

